(A) CFTR Western blot of normal (NL) and CF HBE cultures treated with VX-809 (5 uM) ± VX-770 (5 uM) for 48 hours. “*” indicates the mature, complex glycosylated form of CFTR, band C; “•” indicates the immature band B. (B) Turnover of rescued ΔF508 in BHK-21 cells. ΔF508 was rescued at 27°C in the presence of VX-809 ± VX-770 for 24 hours. After adding cycloheximide (200 ug/ml, 37°C), cells were lysed at the indicated times and analyzed by Western blotting.

(A) CFTR Western blot of normal (NL) and CF HBE cultures treated with VX-809 (5 uM) ± VX-770 (5 uM) for 48 hours. “*” indicates the mature, complex glycosylated form of CFTR, band C; “•” indicates the immature band B. (B) Turnover of rescued ΔF508 in BHK-21 cells. ΔF508 was rescued at 27°C in the presence of VX-809 ± VX-770 for 24 hours. After adding cycloheximide (200 ug/ml, 37°C), cells were lysed at the indicated times and analyzed by Western blotting.